This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X125S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SID Series Double-Rod Cylinder SID125X125S
The AirTAC SID Series Double-Rod Cylinder SID125X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X125S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SID Series Double-Rod Cylinder SID125X125S
The AirTAC SID125X125S is a double-acting double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways at 5734 N @0.5 MPa. This discontinued model features a 125mm bore, 125mm stroke, G1/2 air port, M27x2 rod thread, and a 40mm adjustable cushion at each end. The direct replacement is the SAID125X125S, reusing the same ISO 15552 mounting interface and dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that air cushions only decelerate; an external rod lock or SAIL/BSAI variant is required to hold loads without live air. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SID Series Double-Rod Cylinder SID125X125S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X125S |
| Bore size | Ø125 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID125X125S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAID125X125S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID125X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SID Series Double-Rod Cylinder SID125X125S Is Used
Multi-Tool Workholding
Drives two opposing tools simultaneously from a single piston, using the equal both ways force to clamp and machine parts efficiently.
Anti-Rotation Guiding
The twin-rod architecture prevents mechanical twist during high-thrust operations, maintaining precise alignment without external guides.
Cam-Driven Sensing
Uses the extended rear rod to carry a sensor cam, allowing external position tracking while keeping the primary working end clear.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X125S with the SAID125X125S
To replace the discontinued SID125X125S, install the SAID125X125S directly; it preserves the G1/2 port, M27x2 thread, and ISO 15552 mounting (Basic, FA, LB, TC, FTC, TCM1, TCM2). Size both ways by confirming the 5734 N @0.5 MPa equal force is sufficient, or step to neighbouring bores. A double rod is right when you need anti-rotation, a back rod to carry a sensor cam, or to drive two tools. For strokes >=300mm, verify side-load limits. The -S magnet enables position sensing.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X125S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID125X125S FAQ
Yes, the SID125X125S is discontinued. The direct replacement is the SAID125X125S, which matches the ISO 15552 mounting interface, 125mm bore, 125mm stroke, G1/2 port, and equal both ways force.
Force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Operating pressure is 0.15-1.0 MPa, and speed ranges from 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X125S replacement — usually within 7-8 hours.